Adjustable map or chart support



(No Model.)

H, LAREW.

ADJUSTABLE MAP OR CHART SUPPORT.

' Patented 1 I0v. 6, 1888.

UNITED STATES PATENT OFFICE.

\VILLIAM HENRY LAREW, OF MARIPOSA, CALIFORNIA.

ADJUSTABLE MAP OR CHART SUPPORT.

SPECIFICATION forming part of Letters Patent N 0. 392,565, dated November 6, 1888.

Application filed July 2-1, 188-. Serial No. 280,032. (No 'model.l

To It whom it may concern:

Be it known that 1, WILLIAM HENRY LA- .nnw, of Mariposa, Mariposacount-y, State of California, have invented an Improvement in Adjustable Map or Chart Supports; and I hereby declare the following to beafull,clear, and exact description of the same.

My invention relates to an apparatus for use in schools and for similar purposes; and it consists of a frame and adjustable sliding boards guided so as to travel up and down upon the standards ofthe frame and connected together so as to be moved simultaneously.

It also consists of clamps and holders for charts and papers, and in certain details of construction, all of which will be more fully explained by reference to the accompanying drawings, in which- Figure 1 is a perspective view of my apparatus. Fig. 2 shows one end of the bar in a plan view and the other in vertical longitudinal section. Fig. is a vertical cross-section of the same.

My present invention is an improvement upon a similar device, for which patent was issued to me May 29, 1888.

A A are standards, which are preferably made cylindrical in form, and they have upon their u ppcrcudsthe sleevesorferrules B. From each of these sleeves plates 0 project toward each other when the standards are in the proper position, and they overlap, as shown. lloles are made through these plates, and screws D pass through the holes into the ends of the horizontal top bar, E, which has also sleeves or ferrules F upon its ends. The up' per ends of the legs are thus united to the cross-bar by a strong and ornamental joint.

The standards A diverge from each other toward the bottom, near which each pair is united by a cross-bar, G, the ends of which fit into the T-shaped ferrules H, which ferrules are fitted and secured upon the uprights or standards A.

Upon the bottoms of the uprights A are fitted casters I, the sockets of the casters fitting over the ends of the legs and holding them firmly, preventing them from splitting, and at the same time forming an ornamental finish to the legs.

J J are links, which have one end pivoted to the T-shaped ferrules If. These links ex-- tend toward each other, and are slotted, as shown, so that the screw-pin K passes through the slots, and by means of thumb-nuts L the links may be fixed together at any desired point of overlap. By this construction it is manifest that the uprights A may be separated or closed together by their hinges at the upper ends, and when adjusted to the proper point of separation may be locked at this point by means of the thumb-nuts K, as above shown.

M M are boards having the guiderings N fixed upon each corner. These boards are of such a length as to just tit between the pairs of uprights A, and the guide-rings travel loosely upon the uprights. One of these boards is fitted to the front and the other to the rear pair of upright-s, and the two are united to gether by the cords 0, attached to their upper edges and passing through pulleys 1, which are secured to the ferrules at each end of the upper cross-bar. By this construction the two' boards counterbalance each other, and they may be moved up or down upon the uprights A, so as to adjust the one which is temporarily in use to any desired height with relation to the eye of the pupil or observer. When one board is raised, it is manifest that the other will be correspondingly depressed, and they will serve as counter-balances for each other. In connection with these boards I employ chalk or crayon holding cups Q, which are fitted by means of swivel-sleeveslt to the guide-rings at the lower edges of the boards, and these cups may be turned to the inside between the uprights, entirely out of the way, or they may be swung around to one side or to the front, so as to be convenient for use.' These boards may be used simply as blackboards, to be written or marked upon,or they may serve the important purpose of supporting paper or prepared. cloth, upon which it may be desired to draw permanent diagrams or figures, and they also serve to support charts or maps for other instruction.

In order to conveniently attach charts or maps, which are double or consist of many leaves, I employ cylindrical bars It, having slots cut entirely through them and extending nearly from end to end. Grooves or channels S are made in the ends of these bars, corresponding to and forming continuations of the open slots. Beds '1 are bent at each end, as

shown in Fig. 2, so as to lie within these slots and hook over the endsof the bars. The rods extend along within one side of the slot and serve to separate the bight of the map or pa per, which thus hangs from the rod, passing down through the slot and being supported upon the board M, above described. The ends of the rods are slipped into the loops or rings U at the tops of the boards,to which the eounterbalanced cords O are connected, and may' easily he slipped out and removed or replaced by others at any time.

When single sheets are to be supportedf upon the apparatus, I employ the elastic clamps V, which are curved into ascroll formed as shown, the bight or open central portion slipping over the upper edges of the boards, while the ends press upon the boards with suf:

ficient elastic pressure to hold anysheet which it may be desired to attach temporarily to the boards. By this construction I am enabled to of various sizes, which may have rings or per man'ent attachments, I employ the hooks W, which can be either placed upon the top bar of the frame for the larger maps or over the upper edges of the movable boards.

The whole device can be folded closely to- .gether at any time for transportation or to set it aside out of the way. It is light, portable, andstrong.

Having thus described my invention, whatI claim as new, and desire to secure by Letters Patent, is-

1.. The cylindrical uprights A, having the sleeves or ferrules on their upper ends, and the Overlapping perforated plates extending from said ferrules and through which screwsor pins pass, in combination with the horizontal top red or bar to which these uprights are hinged in pairs, and the slotted connecting-links J on the outer ends of the cross-bars G, with the screws and thumb-nuts, substantially as herein described. 2. The uprights A, connected together in pairs, and having their upper ends hinged to a transverse con neeting-bar, as shown, in combination with the boards M, having guides N traveling upon the uprights, the loops or attachments U upon their upper edges, and the connecting-cords passing over pulleys upon the top rail, substantially as and for the purpose herein described.

3. A map or chart support, consisting of two pairs of uprights mounted upon casters having thehorizontal uniting-bars with their T-shaped ferrules and the adj usting-links and set-screws hear the bottom, the ferrules and hinged joints at their upper ends, by which they are pivoted to the horizontal top bar, the boards M, havingguides N upon their corners, which travel loosely upon the uprights, and the connecting-cords passing through pulleysat the top of the frame and uniting the boards so that they may be moved up or down si-multaueously and counterbalance each other, sub-' stantially-as herein described.

4. The slotted bars It, having grooves or channels at their ends corresponding and in line with the open slots, in combination with the rods T, extending centrally through one side of the slots and having their ends bent so as to fitinto the grooves or channels at the ends of the bars, substantially as herein described.

1 5. The bars having open slots extending from end to end, the grooves or channels at the ends, and the bent or hook-shaped rods fitting these grooves or channels, in combination with the ad j ustably-sliding boards having the rings or loops U at their upper ends for the reception of the bars and to support the charts attached thereto, substantially as herein described.

6. The hinged adjustable uprights having the sliding hoards guided so as to move up or down upon them, and connected together so as to counterbalance each other, and provided with loops or rings U at their upper corners, in combination with the slotted grooved bars R, the rods T, upon which folded sheets are supported, said rods being bent so as to fit into the grooves or channels at the ends of the bars, substantially as herein described.

In witness whereof I have hereunto set my hand.

WILLIAM HENRY LAREW.

' Witnesses:

A. J. MONROE, D. J. FOLEY.

granted November 6, 1888, for was erroneously issued to the that the proper correction has been H. L. 'MULDROW, First Assistant Secretary of thclnterior.

g It is hereby certified that Letters Patent No. 392,565, g; an improvement in Adjustable Map or Chart Supports, inventor, William Henry Larew, as sole owner of said invention; whereas the patent 5 should have beenv granted to the said William Henry Larew and W. 0. Reid, of Mariposa 00., California, jointly, said Reid being the owner of one-half interest, as shown by l; the assignments of record in the Patent Oflice; I a, made in the files and records pertaining to the case in the Patent Oflice, and should he 5 read in the said Letters Patent that the same may conform thereto. I L Signed, conutersigned, and sealed this 25th day of December, A. D. 1888. .E [SEAL] I a a 2 (lountersigned g BENTON J. HALL, 5 Commissioner of Patients.

It is hereby certified that Letters Patent No. 392,565, granted Noveniber 6, 1888, for an improvement in Adjustable Map or Chart Supports, was erroneonsly issued to the inventor, William Henry Larew, as sole owner of said invention; whereas the patent should have beengranted to the said William Henry Larew and W. 0'. Reid, of l ifaripom 00., California, jointly, said Reid being the owner of one-halfinteresflas shown by the assignments of record in the Patent Ofiice; that the proper correction has been made in the files and records pertaining to the case in the Patent Ofiice, and should he read in the said Letters Patent that the sanie may conforn1 thereto.

Signed, countersigned, and sealed this 25th day of Decetnber, A. D. 1888.

[SEAL] H. L. MULDROW,

First Assistant Secretary of thalnterzor. Conntersigned:

BENTON J. HALL,

Commissioner of Patents. 

